131449 has 2 divisors, whose sum is σ = 131450. Its totient is φ = 131448.

The previous prime is 131447. The next prime is 131477. The reversal of 131449 is 944131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 1849 = 360^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 131449 - 2¹ = 131447 is a prime.

Together with 131447, it forms a pair of twin primes.

It is an Ulam number.

131449 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (131441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65724 + 65725.

It is an arithmetic number, because the mean of its divisors is an integer number (65725).

2¹³¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

131449 is a deficient number, since it is larger than the sum of its proper divisors (1).

131449 is an equidigital number, since it uses as much as digits as its factorization.

131449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 131449 is about 362.5589607223. The cubic root of 131449 is about 50.8454890456.

The spelling of 131449 in words is "one hundred thirty-one thousand, four hundred forty-nine".